The origin of the Dynamometer came from the Iowa State College in the early 1900's. In 1926 the Michigan Agricultural College bought one of these such dynamometers for research and the following year, they purchased a 2nd one.
Michigan became actively involved in testing horses for better understanding of what a good draft horse should look like for farm purposes.
Some of these tests included exhibitions at local fairs and with the widespread of enthusiasm of this sport has become quite the event at many fairs and venues today.
Since the purchase of these two original dynamometers in the early 1900's, the Michigan Dynamometer combined the two machines in then 1950's. The Only original equipment in use today is large and small weights. The pump and other components have been replaced.
It is owned by the Michigan Dynamometer Association and has put on many pulls for many years now, not only in the state of Michigan, but surrounding states too.
(Currently is in operation)